I might as well chime in. I don't c u getting any other hits on this topic.
I have a MightyMite
RO/
DI unit that works perfectly for me. It isn't a high output unit. About 2
gal per Hr. Enough for my aquariums as well as my personal consumption.
It mostly depends on the
TDS of ur current water supply as to how well it will work and how much maintenance will b required for ur unit. If u have high Total Dissolved Solids in ur supply water than u will b changing a couple the filters more frequently. It's not as big a deal as it sounds though.
TDS meters aren't expensive and if ur seriously thinking of going this route than u need 1 anyway. Or take a sample of ur tap water into ur
LFS and let them check it. I usually tell people with a lot of iron in their well water not to even bother with it.
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